CDT Indexer cannot find std::unordered_map

Question

My Eclipse CDT indexer apparently cannot find std::unordered_map, although the compiler does. It shows the following "errors":

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The "Includes" folder of my project looks like this:

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How can I tell the indexer how to find std::unordered_map?

You must activate support for C++11. See http://www.eclipse.org/forums/index.php/mv/msg/282618/787571/ for more. — Olaf Dietsche, Dec 07 '12 at 15:56
Your include paths mention gcc 4.2 that is pretty obsolete (regarding C++11 support). Since you use auto keyword, I assume your gcc version to be at least 4.4 (gcc's C++11 support table tells that auto was added in 4.4). So try to change include path according to the most recent gcc's include directory. — Artem Sobolev, Dec 07 '12 at 17:53

score 1 · Answer 1 · edited May 23 '17 at 10:24

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For a solution to the indexer-C++11-problem in general, see the answer to this question: Eclipse CDT indexer does not know C++11 containers

edited May 23 '17 at 10:24

Community

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answered Nov 08 '13 at 12:01

clstaudt

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score 0 · Answer 2 · answered Dec 07 '12 at 16:55

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unordered_map is under tr1 namespace of std.

So you have to add this inclusion:

#include <tr1/unordered_map>

and then you can declare your variable in main in this way:

std::tr1::unordered_map<int,int> mapArray[10];

answered Dec 07 '12 at 16:55

Luca Davanzo

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Not any more. The C++11 standard requires a header `` which declares `std::unordered_map`. – aschepler Dec 07 '12 at 17:16
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Why does the code *compile correctly* using `#include ` then? This is an indexer issue, not a code issue. – clstaudt Dec 07 '12 at 17:36
@aschepler, even in gcc 4.2? – Artem Sobolev Dec 07 '12 at 17:42
@Barmaley.exe: No, I agree with your conclusion that the OP is not using g++ 4.2, so the Eclipse configuration is wrong to search in g++ 4.2 include directories. – aschepler Dec 07 '12 at 18:13

score 0 · Answer 3 · answered Jan 12 '13 at 13:51

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I am using Eclipse Juno CDT and gcc4.7 on Ubuntu 12.10 and have std=c++11 defined. Still indexer was going nuts about unordered_map. Adding TR1 resolved the issue.

answered Jan 12 '13 at 13:51

Ivo Stoyanoff

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CDT Indexer cannot find std::unordered_map

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